Factory Direct Main Counter-Rotating Fan Explosion-Proof Mine Ventilation Fan for Underground Mine

Factory Direct Main Counter-Rotating Fan Explosion-Proof Mine Ventilation Fan for Underground Mine. High Efficiency Counter-Rotating Structure: Dual impellers rotate reversely with static pressure efficiency up to 86% or more. Explosion-Proof Safety Design: Motor isolated in flow cavity to prevent methane gas ignition, meeting national standards. Adjustable Airfoil Blades: Twisted blades allow on-site angle adjustment for varying ventilation conditions. Reverse Ventilation Function: Reverse air volume reaches 60% of direct volume, eliminating need for extra ducts. Direct Motor-Impeller Connection: Avoids belt failures with stable operation, low noise, and easy maintenance. Long Service Life: Safe operation exceeds 13,000 hours before first major repair. Energy Saving Performance: Saves 5%-10% energy compared with conventional fans. Full Customization Options: Supports customization from samples, designs, and flexible minor adjustments.